位移法僅適用于超靜定結(jié)構(gòu)，不能用于分析靜定結(jié)構(gòu)。
1、正確錯誤
暫無解析
Thecountry’schiefexportsarecoal,carsandcottongoods,cars_____themostimportantofthese.
Hesetupinbusiness（）hisownandwasverysuccessful.
_____regulartraininginnursing,shecouldhardlycopewiththeworkatfirst.
Whyaretoday'soldermiddle-agedandelderlybecomingthenewwinners?
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit（）whenshewastryingtogotosleep.
